Recovery and enrichment of heavy metals using new hybrid Donnan dialysis systems combining cation exchange textile and solvent impregnated resin

Berdous, Dalila; Akretche, D.E.

doi:10.1007/s11814-013-0094-8

Cited by 8 publications

(1 citation statement)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Donnan dialysis studies with cation exchange membranes explore separation and valuable metal recovery of ions such as cobalt, nickel, silver, copper, zinc, aluminum, and chromium. − Studies with anion exchange membranes explore removal of harmful ions from water such as arsenate, fluoride, nitrate, and bromide. − Further studies examine the possibility of softening hard water by Donnan dialysis of calcium, magnesium, sulfate, and bicarbonate. − …”

Section: Introductionmentioning

confidence: 99%

Simple Model for Characterizing a Donnan Dialysis Process

Hasson

Beck

Fingerman

et al. 2014

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The objective of this work is to characterize the kinetics of Donnan dialysis process by a simple model. The Nernst–Planck equation is simplified by neglecting the membrane swelling pressure and assuming an average diffusion coefficient for all ions. Experimental data are presented on the permeation of monovalent phosphate ions from a KH2PO4/NaH2PO4 feed solution to a NaCl receiver solution using two different anion exchange membranes: a low flux membrane (Fumasep FAB) and a high flux membrane (Selemion AMV). Measurements indicate a brief initial ion exchange process in which the membrane is loaded with phosphate ions. Phosphate transport data fit the predicted correlations and provide values of the overall kinetic coefficient. The kinetic coefficients derived from both membranes were found to increase linearly with the membrane phosphate concentration. The phosphate dialysis data of the low flux membrane were found to be controlled by a diffusive process, while the data of the high flux membrane were found to be mass transfer controlled. The increase of the kinetic coefficient with phosphate concentration is shown to be related to the increase in membrane ion diffusivity with its solution concentration.

show abstract

Section: Introductionmentioning

confidence: 99%

Simple Model for Characterizing a Donnan Dialysis Process

Hasson

Beck

Fingerman

et al. 2014

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

Ion exchange membrane textile bioreactor as a new alternative for drinking water denitrification

Berdous

Akretche

Abderahmani

et al. 2014

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

This work enters in the optics of the denitrification of a polluted water by two membrane techniques, the Donnan dialysis (DD) and the ion exchange membrane bioreactor (IEMB), using a conventional barrier, composed by an anion exchange membrane (AEM), and a hybrid barrier, where the AEM is combined to an anion exchange textile (AET). The effects of the hydrodynamic factor and the nature of the carbon source on the transfer and the reduction of nitrate ions were studied. The study results obtained through the DD showed the effectiveness of the hybrid barrier in the recovery and concentration of nitrate ions. This was also recorded during denitrification by the hybrid process, called the ion exchange membrane textile bioreactor (IEMTB), with a significant reduction of nitrates, compared to IEMB, due to the efficiency of the Pseudomonas aeruginosa biofilm formed at the surface of the AET. Here, the permselectivity of the membrane and the good bioreduction of the pollutants are no longer major conditions to the better performance of the process. The application of IEMTB in the denitrification of groundwater, having a nitrate concentration of 96.67 ppm, shows a total reduction of nitrate ions without changing the quality of the water. Indeed, the analysis of the recovered water, or yet the treated water, shows the absence of the bacterium by-products and concentrations in the nitrates and nitrites which are, respectively, equal to 0.02±0.01 ppm, and inferiors to the detection limit (<0.02 ppm).

show abstract